Date   

Re: AP1100 Notification Suggestions

Harley Davidson
 

That's a big 10-4 Fernando! I had a G11 and it was a nice mount; BUT, it ain't an Astro-Physics! Like night and day.

tony

On 3/5/2021 12:57 PM, fernandorivera3 via groups.io wrote:
Once you buy a Mach 2 GTO or 1100 GTO, you will never look back to your G11. It <G11> will become a door stop or large paperweight that will end up listed for sale on Cloudy Nights or Astromart!!!

Fernando



Re: AP1100 Notification Suggestions

Roland Christen
 


Encoder mounts are no machined more sloppy than non-encoder mounts. That's a fallacy.

With an encoder mount the periodic error in RA is gone, so you get true sidereal tracking rate. Non-encoder mounts can get close by measuring the periodic error and compensating for it with PEM.

Encoder mounts improve guiding. That's the bottom line. This is especially true for the Dec axis where the encoder basically eliminates any backlash. When the guiding program sends a command to move 1 arc second, the axis will move by that amount, regardless if it's in the same direction or the opposite direction. In a non-encoder mount the motion may take several 1 arc sec commands during a reversal due to backlash and other subtle non-linearity around the zero point. You may or may not get the commanded motion in a non-encoder mount. This is true of all non-encoder mounts, regardless if they are belt driven, have servo motors or steppers.

All of our mounts can be modeled for unguided imaging, but the encoder mounts will follow the model more accurately. So it depends on what focal lengths you are working with and what your tolerance for error is.

Here is a typical guided run with the Mach2 encoder mount. The scope was a 160DEF refractor:
Rolando



-----Original Message-----
From: Mark Lamb <lamb_mark@...>
To: main@ap-gto.groups.io
Sent: Fri, Mar 5, 2021 1:45 pm
Subject: Re: [ap-gto] AP1100 Notification Suggestions

Thanks for the responses so far!

I think I will end up going for the AP1100 instead of waiting (how long??? Daleen said at least 2 more runs) for the Mach2, even though the AP1100's capacity is overkill.  (I have zero appetite for mounting/dismounting an unwieldy 70#+ load, as this will be uncovered on my back patio.)  I also expect the AP1100 is machined to tighter tolerances vs. the Mach2, as it designed to perform at a high level without the need of encoders.  My mind has an analogy of the sound of simpler Class-A audio amplifiers compared to much more complicated Class-AB with extensive feedback.  The feedback intensive Class-AB have much better specs, but the Class-A amplifiers sound MUCH better and realistic (I have actually built my own Class-A preamp and power-amps, and they sound very realistic).  The downside is the Class-A amplifier requires MUCH higher quality components, better power supplies, and more heat sinking.

My concern with reliability of the encoders is more with the read heads and not the encoder rings, as I expect the failure rate of the read heads would be an order of magnitude higher than the rings due to their electronic nature.  It also seems that the read heads are much more expensive than the rings.

I still do not have a good feel for the practical/realisable/tangible performance improvement to be expected w/ the AE version compared to the base AP1100.  I have read reports than base AP1100s guide as good as seeing allows, though I expect this assertion should be conditioned on the actual seeing conditions.  My seeing is better than most, w/ 1.5" typical and 0.7" on the rare good nights (Meteoblue est. for my location).  With my good seeing location, I expect that can actually realize resolution improvement down to ~0.4"/px, a level that I expect to image at for galaxies (EdgeHD925 & QHY268M).   At 0.4"/px scale and assuming guiding w/ and OAG, would the AE add a meaningful improvement?  Or is AE "gilding the lily"?

Daleen called me while I was in the middle of composing this reply, and I had her put me down for a new AP1100, as I do not want to wait 2 years for a Mach2.  She told me to expect September delivery.  I need to talk to George about deciding whether to go for encoders or not. 

I plan on keeping my G11, to allow running 2 imaging rigs to make the most of the precious clear skies.  I will put the G11 on my LW tripod, and put the AP1100 on my FHD tripod beast.  I need George to explain whether I need attach the AP1100 to my FHD; do I need both the 119FSA and 119FP?  Does the combo 119FSA-FP work for the FHD and does it drop into the FHD's normal MA collar?

I know the encoders eliminate DEC backlash.  But, is DEC backlash a practical problem for the base AP1100?  DEC backlash does give me problems with my G11 from time to time, and is my main frustration with my G11.
I know the encoders will reduce RA PE to ~0.25".  What is typical PEC adjusted PE for the base AP1100?  At what image scales does this give problems?

I think I will go for the DOVEDV10 saddle, as I feel the wider clamp spacing of the DOVELM162 could give problems with my Esprit's after-market 7" dovetail plate; I want at least 2 clamps engaged.  With my G11's 8" saddle, the end of my Esprit's 7" plate extends ~0.5" past the front edge.  With the DOVEDV10 extra 1" on both sides of center, it should clamp in both the middle and end.  Does this make sense?

--
Roland Christen
Astro-Physics


Re: AP1100 Notification Suggestions

Christopher Erickson
 

And I expect that both the 1100 and Mach2 are both machined within microns of perfection with no compromises. 

That's just how AP does things.

Do it once, do it right. Don't have to do it over.

-Christopher Erickson
Observatory engineer
Waikoloa, HI 96738
www.summitkinetics.com
   


On Fri, Mar 5, 2021, 10:02 AM Christopher Erickson via groups.io <christopher.k.erickson=gmail.com@groups.io> wrote:
My G11 plus Gemini-II sits in a corner of my living room, holding up my first serious telescope from 50 years ago. A 10" f3.8 Newt. I won't admit how long it has been since it last gathered starlight.

If you never plan to exploit the bigger load capacity of the 1100 and you are a portable imager, then you might benefit from the lighter Mach2. Especially as we get older.

-Christopher Erickson
Observatory engineer
Waikoloa, HI 96738
www.summitkinetics.com
   

On Fri, Mar 5, 2021, 9:45 AM Mark Lamb <lamb_mark@...> wrote:
Thanks for the responses so far!

I think I will end up going for the AP1100 instead of waiting (how long??? Daleen said at least 2 more runs) for the Mach2, even though the AP1100's capacity is overkill.  (I have zero appetite for mounting/dismounting an unwieldy 70#+ load, as this will be uncovered on my back patio.)  I also expect the AP1100 is machined to tighter tolerances vs. the Mach2, as it designed to perform at a high level without the need of encoders.  My mind has an analogy of the sound of simpler Class-A audio amplifiers compared to much more complicated Class-AB with extensive feedback.  The feedback intensive Class-AB have much better specs, but the Class-A amplifiers sound MUCH better and realistic (I have actually built my own Class-A preamp and power-amps, and they sound very realistic).  The downside is the Class-A amplifier requires MUCH higher quality components, better power supplies, and more heat sinking.

My concern with reliability of the encoders is more with the read heads and not the encoder rings, as I expect the failure rate of the read heads would be an order of magnitude higher than the rings due to their electronic nature.  It also seems that the read heads are much more expensive than the rings.

I still do not have a good feel for the practical/realisable/tangible performance improvement to be expected w/ the AE version compared to the base AP1100.  I have read reports than base AP1100s guide as good as seeing allows, though I expect this assertion should be conditioned on the actual seeing conditions.  My seeing is better than most, w/ 1.5" typical and 0.7" on the rare good nights (Meteoblue est. for my location).  With my good seeing location, I expect that can actually realize resolution improvement down to ~0.4"/px, a level that I expect to image at for galaxies (EdgeHD925 & QHY268M).   At 0.4"/px scale and assuming guiding w/ and OAG, would the AE add a meaningful improvement?  Or is AE "gilding the lily"?

Daleen called me while I was in the middle of composing this reply, and I had her put me down for a new AP1100, as I do not want to wait 2 years for a Mach2.  She told me to expect September delivery.  I need to talk to George about deciding whether to go for encoders or not. 

I plan on keeping my G11, to allow running 2 imaging rigs to make the most of the precious clear skies.  I will put the G11 on my LW tripod, and put the AP1100 on my FHD tripod beast.  I need George to explain whether I need attach the AP1100 to my FHD; do I need both the 119FSA and 119FP?  Does the combo 119FSA-FP work for the FHD and does it drop into the FHD's normal MA collar?

I know the encoders eliminate DEC backlash.  But, is DEC backlash a practical problem for the base AP1100?  DEC backlash does give me problems with my G11 from time to time, and is my main frustration with my G11.
I know the encoders will reduce RA PE to ~0.25".  What is typical PEC adjusted PE for the base AP1100?  At what image scales does this give problems?

I think I will go for the DOVEDV10 saddle, as I feel the wider clamp spacing of the DOVELM162 could give problems with my Esprit's after-market 7" dovetail plate; I want at least 2 clamps engaged.  With my G11's 8" saddle, the end of my Esprit's 7" plate extends ~0.5" past the front edge.  With the DOVEDV10 extra 1" on both sides of center, it should clamp in both the middle and end.  Does this make sense?


Re: AP1100 Notification Suggestions

Christopher Erickson
 

My G11 plus Gemini-II sits in a corner of my living room, holding up my first serious telescope from 50 years ago. A 10" f3.8 Newt. I won't admit how long it has been since it last gathered starlight.

If you never plan to exploit the bigger load capacity of the 1100 and you are a portable imager, then you might benefit from the lighter Mach2. Especially as we get older.

-Christopher Erickson
Observatory engineer
Waikoloa, HI 96738
www.summitkinetics.com
   

On Fri, Mar 5, 2021, 9:45 AM Mark Lamb <lamb_mark@...> wrote:
Thanks for the responses so far!

I think I will end up going for the AP1100 instead of waiting (how long??? Daleen said at least 2 more runs) for the Mach2, even though the AP1100's capacity is overkill.  (I have zero appetite for mounting/dismounting an unwieldy 70#+ load, as this will be uncovered on my back patio.)  I also expect the AP1100 is machined to tighter tolerances vs. the Mach2, as it designed to perform at a high level without the need of encoders.  My mind has an analogy of the sound of simpler Class-A audio amplifiers compared to much more complicated Class-AB with extensive feedback.  The feedback intensive Class-AB have much better specs, but the Class-A amplifiers sound MUCH better and realistic (I have actually built my own Class-A preamp and power-amps, and they sound very realistic).  The downside is the Class-A amplifier requires MUCH higher quality components, better power supplies, and more heat sinking.

My concern with reliability of the encoders is more with the read heads and not the encoder rings, as I expect the failure rate of the read heads would be an order of magnitude higher than the rings due to their electronic nature.  It also seems that the read heads are much more expensive than the rings.

I still do not have a good feel for the practical/realisable/tangible performance improvement to be expected w/ the AE version compared to the base AP1100.  I have read reports than base AP1100s guide as good as seeing allows, though I expect this assertion should be conditioned on the actual seeing conditions.  My seeing is better than most, w/ 1.5" typical and 0.7" on the rare good nights (Meteoblue est. for my location).  With my good seeing location, I expect that can actually realize resolution improvement down to ~0.4"/px, a level that I expect to image at for galaxies (EdgeHD925 & QHY268M).   At 0.4"/px scale and assuming guiding w/ and OAG, would the AE add a meaningful improvement?  Or is AE "gilding the lily"?

Daleen called me while I was in the middle of composing this reply, and I had her put me down for a new AP1100, as I do not want to wait 2 years for a Mach2.  She told me to expect September delivery.  I need to talk to George about deciding whether to go for encoders or not. 

I plan on keeping my G11, to allow running 2 imaging rigs to make the most of the precious clear skies.  I will put the G11 on my LW tripod, and put the AP1100 on my FHD tripod beast.  I need George to explain whether I need attach the AP1100 to my FHD; do I need both the 119FSA and 119FP?  Does the combo 119FSA-FP work for the FHD and does it drop into the FHD's normal MA collar?

I know the encoders eliminate DEC backlash.  But, is DEC backlash a practical problem for the base AP1100?  DEC backlash does give me problems with my G11 from time to time, and is my main frustration with my G11.
I know the encoders will reduce RA PE to ~0.25".  What is typical PEC adjusted PE for the base AP1100?  At what image scales does this give problems?

I think I will go for the DOVEDV10 saddle, as I feel the wider clamp spacing of the DOVELM162 could give problems with my Esprit's after-market 7" dovetail plate; I want at least 2 clamps engaged.  With my G11's 8" saddle, the end of my Esprit's 7" plate extends ~0.5" past the front edge.  With the DOVEDV10 extra 1" on both sides of center, it should clamp in both the middle and end.  Does this make sense?


Re: AP1100 Notification Suggestions

Dale Ghent
 

On Mar 5, 2021, at 14:45, Mark Lamb <lamb_mark@hotmail.com> wrote:

I also expect the AP1100 is machined to tighter tolerances vs. the Mach2, as it designed to perform at a high level without the need of encoders.
I wouldn't make this sort of simplistic assumption. Short of any design differences, thinking that tolerances are somehow purposefully lesser or more when comparing any two mount models is an odd thing to assert. They're all machined and made on the same equipment, after all, and quite a few people who are intimate with their design and construction are right here on this mailing list.


Re: Mach1GTO RA axis sticking

Keith Egger
 

Thanks. I'll do that early next week as it's getting late on a Friday afternoon.

Keith


Re: AP1100 Notification Suggestions

Mark Lamb
 

Thanks for the responses so far!

I think I will end up going for the AP1100 instead of waiting (how long??? Daleen said at least 2 more runs) for the Mach2, even though the AP1100's capacity is overkill.  (I have zero appetite for mounting/dismounting an unwieldy 70#+ load, as this will be uncovered on my back patio.)  I also expect the AP1100 is machined to tighter tolerances vs. the Mach2, as it designed to perform at a high level without the need of encoders.  My mind has an analogy of the sound of simpler Class-A audio amplifiers compared to much more complicated Class-AB with extensive feedback.  The feedback intensive Class-AB have much better specs, but the Class-A amplifiers sound MUCH better and realistic (I have actually built my own Class-A preamp and power-amps, and they sound very realistic).  The downside is the Class-A amplifier requires MUCH higher quality components, better power supplies, and more heat sinking.

My concern with reliability of the encoders is more with the read heads and not the encoder rings, as I expect the failure rate of the read heads would be an order of magnitude higher than the rings due to their electronic nature.  It also seems that the read heads are much more expensive than the rings.

I still do not have a good feel for the practical/realisable/tangible performance improvement to be expected w/ the AE version compared to the base AP1100.  I have read reports than base AP1100s guide as good as seeing allows, though I expect this assertion should be conditioned on the actual seeing conditions.  My seeing is better than most, w/ 1.5" typical and 0.7" on the rare good nights (Meteoblue est. for my location).  With my good seeing location, I expect that can actually realize resolution improvement down to ~0.4"/px, a level that I expect to image at for galaxies (EdgeHD925 & QHY268M).   At 0.4"/px scale and assuming guiding w/ and OAG, would the AE add a meaningful improvement?  Or is AE "gilding the lily"?

Daleen called me while I was in the middle of composing this reply, and I had her put me down for a new AP1100, as I do not want to wait 2 years for a Mach2.  She told me to expect September delivery.  I need to talk to George about deciding whether to go for encoders or not. 

I plan on keeping my G11, to allow running 2 imaging rigs to make the most of the precious clear skies.  I will put the G11 on my LW tripod, and put the AP1100 on my FHD tripod beast.  I need George to explain whether I need attach the AP1100 to my FHD; do I need both the 119FSA and 119FP?  Does the combo 119FSA-FP work for the FHD and does it drop into the FHD's normal MA collar?

I know the encoders eliminate DEC backlash.  But, is DEC backlash a practical problem for the base AP1100?  DEC backlash does give me problems with my G11 from time to time, and is my main frustration with my G11.
I know the encoders will reduce RA PE to ~0.25".  What is typical PEC adjusted PE for the base AP1100?  At what image scales does this give problems?

I think I will go for the DOVEDV10 saddle, as I feel the wider clamp spacing of the DOVELM162 could give problems with my Esprit's after-market 7" dovetail plate; I want at least 2 clamps engaged.  With my G11's 8" saddle, the end of my Esprit's 7" plate extends ~0.5" past the front edge.  With the DOVEDV10 extra 1" on both sides of center, it should clamp in both the middle and end.  Does this make sense?


Re: Mach1GTO RA axis sticking

Roland Christen
 

You can call the office and they will connect you to George.

Rolando



-----Original Message-----
From: Keith Egger <eggerk@...>
To: main@ap-gto.groups.io
Sent: Fri, Mar 5, 2021 12:09 pm
Subject: Re: [ap-gto] Mach1GTO RA axis sticking

As I mentioned in Andrew's thread, my re-greasing of the Dec motor gears didn't go smoothly. I damaged one of the two brass axle shoulder bolts by over-tightening (I know, I was warned in the instructions, but one never really knows what over-tight is until there's damage). Who do I contact about getting a replacement? I emailed George, but haven't heard back. Is George the correct person to contact, or should I send my request to someone else?

thanks, Keith

--
Roland Christen
Astro-Physics


Re: AP1100 Notification Suggestions

Eric Weiner
 

Couldn’t agree more


On Mar 5, 2021, at 10:57, fernandorivera3 via groups.io <fernandorivera3@...> wrote:

Once you buy a Mach 2 GTO or 1100 GTO, you will never look back to your G11. It <G11> will become a door stop or large paperweight that will end up listed for sale on Cloudy Nights or Astromart!!!

Fernando


Re: AP1100 Notification Suggestions

Dale Ghent
 

Oh gosh, the through-mount cabling is such a great thing. I use it on my Mach1 and can imagine working without it. The Mach2 still has its version of that, but of course its requirements mean less flexibility on that front, pun intended. I polar align using SharpCap so the the wires interfering with the RAPAS aren't an issue.

On Mar 5, 2021, at 13:20, Christopher Erickson <christopher.k.erickson@gmail.com> wrote:

For me, the 1100 makes more sense.

Bigger payload, splittable, more cable-through-the-mount options.

And I prefer servos over steppers.

"My advice is always free and worth every penny!"

-Christopher Erickson
Observatory Engineer
Summit Kinetics
Waikoloa, Hawaii


On Fri, Mar 5, 2021 at 8:16 AM Dale Ghent <daleg@elemental.org> wrote:


On Mar 4, 2021, at 23:22, Mark Lamb <lamb_mark@hotmail.com> wrote:

Part of me wants to bite the bullet, and go whole hog for the AP1100 w/ encoders, assuming I would eventually want encoders, as AP would install them, make sure everything is adjusted properly, and save $1000 vs. adding on down the road. Only if the encoders actually provide meaningful performance advantage for AP.
I just went full hog on the 1100 with the AEL variant.

Here's one thing that Paige explained to me. You can reserve an AE or AEL model now and, if you need to, downgrade the order to a regular version later, I guess as long as it's a reasonable time prior to shipment. A-P just needs to know /now/ if you want encoders now so that they can properly arrange their orders with Renishaw which have lead times of their own.

As for Mach2 vs. 1100, I also struggled with this decision, and even passed up a Mach2 when my name came up on the list. Even though I image with a 130GTX now, I decided to go with the 1100 after reasoning that I plan to also image with a reflector of some sort (RC or *DK type) in the future, and the moment-arm of such an OTA+accessories would need to be manageable by the mount. This mount will eventually live under a dome somewhere, and encoders are a serious quality of life improvement bordering on requirement in such a setting.

/dale





Re: AP1100 Notification Suggestions

Christopher Erickson
 

For me, the 1100 makes more sense.

Bigger payload, splittable, more cable-through-the-mount options.

And I prefer servos over steppers.

"My advice is always free and worth every penny!"

-Christopher Erickson
Observatory Engineer
Summit Kinetics
Waikoloa, Hawaii


On Fri, Mar 5, 2021 at 8:16 AM Dale Ghent <daleg@...> wrote:


> On Mar 4, 2021, at 23:22, Mark Lamb <lamb_mark@...> wrote:
>
> Part of me wants to bite the bullet, and go whole hog for the AP1100 w/ encoders, assuming I would eventually want encoders, as AP would install them, make sure everything is adjusted properly, and save $1000 vs. adding on down the road.  Only if the encoders actually provide meaningful performance advantage for AP.

I just went full hog on the 1100 with the AEL variant.

Here's one thing that Paige explained to me. You can reserve an AE or AEL model now and, if you need to, downgrade the order to a regular version later, I guess as long as it's a reasonable time prior to shipment. A-P just needs to know /now/ if you want encoders now so that they can properly arrange their orders with Renishaw which have lead times of their own.

As for Mach2 vs. 1100, I also struggled with this decision, and even passed up a Mach2 when my name came up on the list. Even though I image with a 130GTX now, I decided to go with the 1100 after reasoning that I plan to also image with a reflector of some sort (RC or *DK type) in the future, and the moment-arm of such an OTA+accessories would need to be manageable by the mount. This mount will eventually live under a dome somewhere, and encoders are a serious quality of life improvement bordering on requirement in such a setting.

/dale





Re: AP1100 Notification Suggestions

Dale Ghent
 

On Mar 4, 2021, at 23:22, Mark Lamb <lamb_mark@hotmail.com> wrote:

Part of me wants to bite the bullet, and go whole hog for the AP1100 w/ encoders, assuming I would eventually want encoders, as AP would install them, make sure everything is adjusted properly, and save $1000 vs. adding on down the road. Only if the encoders actually provide meaningful performance advantage for AP.
I just went full hog on the 1100 with the AEL variant.

Here's one thing that Paige explained to me. You can reserve an AE or AEL model now and, if you need to, downgrade the order to a regular version later, I guess as long as it's a reasonable time prior to shipment. A-P just needs to know /now/ if you want encoders now so that they can properly arrange their orders with Renishaw which have lead times of their own.

As for Mach2 vs. 1100, I also struggled with this decision, and even passed up a Mach2 when my name came up on the list. Even though I image with a 130GTX now, I decided to go with the 1100 after reasoning that I plan to also image with a reflector of some sort (RC or *DK type) in the future, and the moment-arm of such an OTA+accessories would need to be manageable by the mount. This mount will eventually live under a dome somewhere, and encoders are a serious quality of life improvement bordering on requirement in such a setting.

/dale


Re: Mach1GTO RA axis sticking

Keith Egger
 

As I mentioned in Andrew's thread, my re-greasing of the Dec motor gears didn't go smoothly. I damaged one of the two brass axle shoulder bolts by over-tightening (I know, I was warned in the instructions, but one never really knows what over-tight is until there's damage). Who do I contact about getting a replacement? I emailed George, but haven't heard back. Is George the correct person to contact, or should I send my request to someone else?

thanks, Keith


Re: AP1100 Notification Suggestions

fernandorivera3
 

Once you buy a Mach 2 GTO or 1100 GTO, you will never look back to your G11. It <G11> will become a door stop or large paperweight that will end up listed for sale on Cloudy Nights or Astromart!!!

Fernando


Re: AP1100 Notification Suggestions

Dean Jacobsen
 

On Fri, Mar 5, 2021 at 09:36 AM, dvjbaja wrote:
And if you don't like the 1100, it's an easy aftermarket sell.  
Over the years I have had an AP900, an AP1200, another AP900 and then a Mach2.  I can't imagine Mark not liking an AP11000.  I guess it could happen but not likely IMHO.
 
--
Dean Jacobsen
http://astrophoto.net/wp/
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin Image Gallery - https://www.astrobin.com/users/deanjacobsen/ 
Amateur Radio Call Sign - W6DBJ


Re: AP1100 Notification Suggestions

dvjbaja
 

Mark, 

Pay the Piper.  Buy the 1100.  Sell the G11, you'll not buy another mount again.    And if you don't like the 1100, it's an easy aftermarket sell.  

- j

On Fri, Mar 5, 2021 at 7:14 AM Mark Lamb <lamb_mark@...> wrote:

Tonight, I just got the notification on the availability of a new AP1100.  What should I do?

 

Prior to the $1700 price increase, I was thinking I would get the 1st available Mach2 or AP1100, but the big price increase gave me indigestion.  So I flirted with the idea of a MyT, but its issues (crosstalk, only USB2 through mount, and poorly engineered computer board) made think that it may be frustrating to get to work properly.

 

If I could get the Mach2 within a few months at $9K, I would prefer it to the AP1100 at $9.7K or $15.3K w/ encoders.  But who knows when I will get notified on the Mach2 (got on list at the end of Nov2020).  What is the wait expectation for Nov2020 entrants?

 

Then I look at the massive financial mismanagement at the federal govt level (money for nothing, endless bailouts), and the powers to be are dead set on trashing the currency and letting the nasty inflation genie out of the bottle.  This is already showing up in massive increases in commodity prices and people spending their free dollars are driving prices on products up and availability down.  With this, I fear that this price increase is just the first of many to come in the next few years.

 

Part of me wants to bite the bullet, and go whole hog for the AP1100 w/ encoders, assuming I would eventually want encoders, as AP would install them, make sure everything is adjusted properly, and save $1000 vs. adding on down the road.  Only if the encoders actually provide meaningful performance advantage for AP.

 

Questions:

 

What is the expected life span and reliability of the Renishaw readers?  (Hate to have $4-5K parts that only last for a few years on a 20 year mount.  This could drastically change the value proposition.)

 

If I keep my load to no more than 50#, in an environment that has good seeing (1.5" typ) and low wind, is there much to be gained by adding encoders to the AP1100?

 

With 50# load (or below) what are the expected performance differences between a Mach2 and AP1100 (w/o encoders)?

 

Suggestions?

 

I am 99% Photography only, and my current scopes are Esprit 100 and EdgeHD925, with intention of getting a 120-150mm APO, and my cameras are ASI183mm-Pro and QHY268M (coming).  My current and only mount is a G11.

 

Thanks!

 
 


Re: Mach1GTO RA axis sticking

Keith Egger
 

Didn’t know I could use PayPal. 

thanks


Re: AP1100 Notification Suggestions

Roland Christen
 

The Renishaws are rugged industrial quality encoders that are used worldwide in automation and robotic equipment. We have mounts that go back 20 years and not had a single encoder failure. The encoder rings are stainless steel, well protected inside the mounts and are impervious to most contaminants. They are not fragile glass or plastic discs and I don't expect them to ever wear out until the sun goes into the red giant phase.

The Mach2 and 1100 mounts have different geometries. The 1100 can swing more weight simply because the gearwheels are larger. The Mach2 is more intuitive and less prone to user mistakes. For 50lb loads, either one will work fine, and the performance will be the same.

Roland



-----Original Message-----
From: Mark Lamb <lamb_mark@...>
To: main@ap-gto.groups.io
Sent: Thu, Mar 4, 2021 10:22 pm
Subject: [ap-gto] AP1100 Notification Suggestions

Tonight, I just got the notification on the availability of a new AP1100.  What should I do?
 
Prior to the $1700 price increase, I was thinking I would get the 1st available Mach2 or AP1100, but the big price increase gave me indigestion.  So I flirted with the idea of a MyT, but its issues (crosstalk, only USB2 through mount, and poorly engineered computer board) made think that it may be frustrating to get to work properly.
 
If I could get the Mach2 within a few months at $9K, I would prefer it to the AP1100 at $9.7K or $15.3K w/ encoders.  But who knows when I will get notified on the Mach2 (got on list at the end of Nov2020).  What is the wait expectation for Nov2020 entrants?
 
Then I look at the massive financial mismanagement at the federal govt level (money for nothing, endless bailouts), and the powers to be are dead set on trashing the currency and letting the nasty inflation genie out of the bottle.  This is already showing up in massive increases in commodity prices and people spending their free dollars are driving prices on products up and availability down.  With this, I fear that this price increase is just the first of many to come in the next few years.
 
Part of me wants to bite the bullet, and go whole hog for the AP1100 w/ encoders, assuming I would eventually want encoders, as AP would install them, make sure everything is adjusted properly, and save $1000 vs. adding on down the road.  Only if the encoders actually provide meaningful performance advantage for AP.
 
Questions:
 
What is the expected life span and reliability of the Renishaw readers?  (Hate to have $4-5K parts that only last for a few years on a 20 year mount.  This could drastically change the value proposition.)
 
If I keep my load to no more than 50#, in an environment that has good seeing (1.5" typ) and low wind, is there much to be gained by adding encoders to the AP1100?
 
With 50# load (or below) what are the expected performance differences between a Mach2 and AP1100 (w/o encoders)?
 
Suggestions?
 
I am 99% Photography only, and my current scopes are Esprit 100 and EdgeHD925, with intention of getting a 120-150mm APO, and my cameras are ASI183mm-Pro and QHY268M (coming).  My current and only mount is a G11.
 
Thanks!
 
 

--
Roland Christen
Astro-Physics


Re: How to Re-grease a Mach1 with Auto-Adjust Motor Boxes?

Keith Egger
 

On Fri, Mar 5, 2021 at 07:02 AM, Bill Long wrote:
Only I can screw it up (the first time). 🙂 

Hey Bill, I’m also in that club! 

Keith


Re: Ring Terminals (CABPP18R) size

Terry White
 

The ring connector ID is 3/8" according to https://powerwerx.com/powerpole-pp75-supply-cable-8-gauge. It's designed to fit the Powerwerx DC power supplies.

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